Matches 1 - 4 out of 4
Match Document Document Title
7072476 Audio headset  
A headset includes two earpieces. One earpiece acts as a microphone, and the other earpiece acts as an earphone. Isolated from background noise and vibrations due to bone conduction, the microphone...
6370245 Full duplex communication circuits with bilateral T hybrid and balanced impedance configurations  
Full duplex circuits provide a bi-directional signal path at one port for transmit and receive signals and also provide separation between the transmit and receive signals at their respective...
5907538 Full duplex communication circuit with a transducer for simultaneously generating audio output and receiving audio input  
A full duplex communication circuit uses a transducer as both a microphone and speaker/earphone to provide full duplex communication without acoustical feedback. The circuit uses a novel amplifier...
4996709 Intercom telephone  
An intercom system for use in combination with a multi-line telephone system wherein the intercom system utilizes the same wire pair for communications between intercom units that is used for...
Matches 1 - 4 out of 4